NEET UG CHEMISTRY MCQ: CHEMICAL BONDING & MOLECULAR STRUCTURE

Option C (Having low value of dipole moment than $\mathrm{N}{\mathrm{H}_3}$) is correct because in $NF_3$, the dipole moments of the N-F bonds are in the opposite direction to the dipole moment of the lone pair on nitrogen, partially canceling it out, while in $NH_3$, the dipole moments of the N-H bonds are in the same direction as the dipole moment of the lone pair.